. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. Fig. 15.—Chalcosoma atlas. Upper figure, male (reduced); lower figure, female (natural size). A most remarkable distinction between the sexes of many beetles is presented by the great horns which rise from the head, thorax, or clypeus of the males; and in some few cases from the under surface of the body. These horns, in the great family of the JLamellicorns, resemble those of various quadrupeds, such as stags, rhinocero
. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. Fig. 15.—Chalcosoma atlas. Upper figure, male (reduced); lower figure, female (natural size). A most remarkable distinction between the sexes of many beetles is presented by the great horns which rise from the head, thorax, or clypeus of the males; and in some few cases from the under surface of the body. These horns, in the great family of the JLamellicorns, resemble those of various quadrupeds, such as stags, rhinoceroses, etc., .and are wonderful both from their size and diversi- fied shapes. Instead of describing them, I have given figures of the males and females of some of the more re- markable forms. (Figs. 15 to 19.) The females gen-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. New York, D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectevoluti, bookyear1872
